Sub-Sampling Robot (SSR)
Sub-Sampling Robot (SSR)
The Sub-Sampling Robot (SSR) is a high-throughput laboratory automation system designed to accurately transfer milk samples from flasks into vials for analysis. It delivers a precise, repeatable and fully traceable sub-sampling process, improving consistency in milk testing and dairy herd testing (DHI) laboratories while reducing manual handling.
Developed in conjunction with Livestock Improvement Corporation, New Zealand (LIC), the system was created to replace a long-standing manual workflow where samples were processed one at a time—requiring identification, mixing, de-capping, scanning and weighing. This process was time-consuming, labour-intensive and highly dependent on operator accuracy, increasing the risk of variability and human error.
System Overview
The Sub-Sampling Robot (SSR) automates the critical pre-analytical steps required for milk sample preparation, combining multiple processes into a single, coordinated workflow. The system is designed to operate as part of a fully automated solution with the Mapper Weigher, while also maintaining the flexibility to run independently where required.
When integrated with the Mapper Weigher, the SSR uses pre-recorded sample weights and tray mapping data to verify flask volumes prior to sub-sampling. This ensures only valid samples are processed, improving overall data integrity and traceability.
Samples are transferred directly from the Mapper Weigher into the SSR, where trays are automatically inverted to ensure homogenous mixing. Flasks are then de-capped and prepared for sub-sampling. At the same time, empty vial trays are loaded and each vial is identified via barcode scanning.
Using a precision dispensing system, the SSR transfers consistent volumes of milk from each flask into its corresponding vial. An integrated vision system verifies vial fill volumes against expected values, detecting any inconsistencies and ensuring accuracy. Vials containing valid samples are then capped, and trays are released for further laboratory analysis.
Machine Software
The system is supported by integrated control software that manages the entire workflow, ensuring full traceability of every sample. All process data - including identification, weight verification, and sub-sampling status—is monitored in real time and communicated directly to the laboratory LIMS, enabling accurate reporting, tracking, and process control.
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Key Features
- Precision Sub-Sampling
Accurately transfers consistent volumes of milk from flasks into vials - Sample Identification & Tracking
Barcode scanning ensures correct sample-to-vial matching throughout the process - Mapper Weigher Integration
Utilises pre-recorded weight and mapping data for upstream sample validation - Automated Sample Mixing
Tray inversion ensures homogenous, representative samples prior to processing - Flask and Vial Handling Automation
Manages decapping, vial loading, and capping without manual intervention - Vision-Based Volume Verification
Confirms vial fill levels and detects inconsistencies during processing - Automated Syringe Rinsing
Cleans dispensing components between samples to minimise contamination - Integrated Control Software
Monitors workflow and manages sample data throughout the process - LIMS Connectivity
Transfers sample data for reporting, tracking and workflow integration
Key Benefits
- Consistent and Reliable Results
Reduces variability in sample preparation and removes variability associated with manual processes for more dependable milk analysis - Improved Laboratory Efficiency
Streamlines high-volume workflows and reduces processing time - Reduced Manual Workload
Minimises operator involvement in repetitive handling tasks - Enhanced Sample Integrity
Maintains representative samples through controlled handling and processing - Greater Data Confidence
Ensures accurate sample tracking and reporting through system integration - Improved Workplace Safety
Reduces repetitive strain (RSOI) and manual handling risks for laboratory staff - Designed for High-Throughput Laboratories
Supports the demands of herd testing (DHI) and large sample volumes
Other Custom Laboratory Applications
While the system was originally developed as a bespoke solution for Livestock Improvement Corporation, the underlying technology and automation approach can be applied to a wide range of sample handling and sub-sampling workflows.
As laboratory specialists, Motion Design can design and build similar systems tailored to specific application requirements, including different sample types, container formats, identification methods, and process steps.
See Our Custom Machine Design and Build for more information.
